Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. Both TVs come with smart platforms that support popular streaming apps and voice control features. From a practical standpoint, both options provide a reliable viewing experience for most users. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. TCL 40S5400 features a 40 Inch (102 cm) screen while Mi Xiaomi TV A 43 FHD 2026 comes with 43 Inch (109.22 cm), which can make a noticeable difference depending on your room size and viewing distance. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. If you're comparing TCL 40S5400 and Mi Xiaomi TV A 43 FHD 2026, both models come with modern features and are designed to deliver a solid viewing experience across different use cases.

Verdict: Both TVs are strong contenders, and your final choice should depend on your preference for screen size, motion performance, and smart features.